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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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2f8be0e516
[Why] Sometimes CRTCs can be disabled due to display unplugging or temporarily transition in the userspace; in these circumstances, DCE tries to set the minimum clock threshold. When we have this situation, the function bw_calcs is invoked with number_of_displays set to zero, making DCE set dispclk_khz and sclk_khz to zero. For these reasons, we have seen some ATOM bios errors that look like: [drm:atom_op_jump [amdgpu]] *ERROR* atombios stuck in loop for more than 5secs aborting [drm:amdgpu_atom_execute_table_locked [amdgpu]] *ERROR* atombios stuck executing EA8A (len 761, WS 0, PS 0) @ 0xEABA [How] This error happens due to an attempt to optimize the bandwidth using the sclk, and the dispclk clock set to zero. Technically we handle this in the function dce112_set_clock, but we are not considering the case that this value is set to zero. This commit fixes this issue by ensuring that we never set a minimum value below the minimum clock threshold. Signed-off-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com> Reviewed-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com> Acked-by: Eryk Brol <eryk.brol@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com> |
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| TODO | ||